Toxicity of imidacloprid to collembolans in two tropical soils under different soil moisture.

abstract：:Phosphorus (P) budgets for large watersheds are often used to predict trends in riverine P export. To test such predictions, we calculated annual P budgets for 1975-1995 for soils of the Maumee and Sandusky watersheds of northwestern Ohio and compared them with riverine P export from these watersheds. Phosphorus input...

journal_title：Journal of environmental quality

authors： Baker DB,Richards RP

更新日期：2002-01-01 00:00:00

abstract：:Bioalkylation and colloid formation of selenium during selenate removal in upflow anaerobic sludge bed (UASB) bioreactors was investigated. The mesophilic (30 degrees C) UASB reactor (pH = 7.0) was operated for 175 d with lactate as electron donor at an organic loading rate of 2 g COD L(-1) d(-1) and a selenium loadin...

journal_title：Journal of environmental quality

authors： Lenz M,Smit M,Binder P,van Aelst AC,Lens PN

更新日期：2008-08-08 00:00:00

abstract：:Scaling in situ soil water content time series data to a large spatial domain is a key element of watershed environmental monitoring and modeling. The primary method of estimating and monitoring large-scale soil water content distributions is via in situ networks. It is critical to establish the stability of in situ n...

journal_title：Journal of environmental quality

authors： Cosh MH,Starks PJ,Guzman JA,Moriasi DN

更新日期：2014-07-01 00:00:00

abstract：:Closed chambers used to measure soil-atmosphere exchange of trace gases including nitrous oxide (N(2)O) and carbon dioxide (CO(2)) generate errors due to suppression of the gas concentration gradient at the soil-atmosphere interface. A method is described here for estimating the magnitude of flux underestimation arisi...

journal_title：Journal of environmental quality

authors： Venterea RT

更新日期：2009-12-30 00:00:00

abstract：:This study was undertaken to determine the fate of As, Mo, and V (trace elements, TEs) in the sediments of a constructed wetland in use for the remediation of potentially toxic trace element-contaminated agricultural drainwater. After three years of wetland operation, sediment cores were collected to determine changes...

journal_title：Journal of environmental quality

authors： Fox PM,Doner HE

更新日期：2003-11-01 00:00:00

abstract：:Many soils of the Mediterranean region with a semiarid climate are subjected to progressive degradation as a result of water erosion. Biosolids and municipal solid wastes (MSW) were surface-applied once at three rates (40, 80, and 120 Mg ha(-1)) to different plots in a degraded semiarid ecosystem. The study was conduc...

journal_title：Journal of environmental quality

authors： Martínez F,Cuevas G,Calvo R,Walter I

更新日期：2003-03-01 00:00:00

abstract：:Escherichia coli is a ubiquitous component of the intestinal microflora of warm-blooded animals, and is an indicator of fecal contamination of surface waters. Ribotype profiling of E. coli is one of several genotypic methods that has been developed to determine the host origin of fecal bacteria. Like most genotypic me...

journal_title：Journal of environmental quality

authors： Jenkins MB,Hartel PG,Olexa TJ,Stuedemann JA

更新日期：2003-01-01 00:00:00

abstract：:The Deckers Creek watershed in northern West Virginia (USA), containing a land area of 166 km2 (63 mi2), has a long history of industrial development and attendant environmental abuses from both land and water pollution practices. The water in Deckers Creek was sampled in 1974 at 29 locations along the main stem and r...

journal_title：Journal of environmental quality

authors： Stewart J,Skousen J

更新日期：2003-03-01 00:00:00

abstract：:Land treatment of municipal wastewater effluent is a proven method for augmenting freshwater resources and avoiding direct nutrient discharges to surface waters. We assessed changes in soil test phosphorus (P) of the Ap horizon of cropped fields continuously irrigated for 26 yr with secondary effluent from the Penn St...

journal_title：Journal of environmental quality

authors： Jaiswal D,Elliott HA

更新日期：2011-01-01 00:00:00

abstract：:Previous studies have suggested that phenolic acids from legume green manures may contribute to weed control through allelopathy. The objectives of this study were to investigate the oxidation reactions of phenolic acids in soil and to determine the subsequent effects of oxidation upon phytotoxicity. Soils were reacte...

journal_title：Journal of environmental quality

authors： Ohno T

更新日期：2001-09-01 00:00:00

abstract：:To integrate biochar as a practical and successful remedial amendment at northern landfarms, components of its formulation and application must be optimized for site-specific environmental conditions. Different biochar amendments were applied to petroleum hydrocarbon (PHC)-contaminated soil at two northern field sites...

journal_title：Journal of environmental quality

authors： Karppinen EM,Siciliano SD,Stewart KJ

更新日期：2017-07-01 00:00:00

abstract：:Pesticide transport through the unsaturated zone is a function of chemical and soil characteristics, application, and water recharge rate. The fate and transport of 82 pesticides and degradates were investigated at five different agricultural sites. Atrazine and metolachlor, as well as several of the degradates of atr...

journal_title：Journal of environmental quality

authors： Hancock TC,Sandstrom MW,Vogel JR,Webb RM,Bayless ER,Barbash JE

更新日期：2008-05-02 00:00:00

abstract：:A microplate method was developed as a tool to test phages for their ability to control Salmonella in aqueous environments. The method used EPA (U.S. Environmental Protection Agency) worst case water (WCW) in 96-well plates. The WCW provided a consistent and relatively simple defined turbid aqueous matrix, high in tot...

journal_title：Journal of environmental quality

authors： McLaughlin MR,Brooks JP

更新日期：2008-01-04 00:00:00

abstract：:A lysimeter trench was established at the Gardermoen delta (50 km north of Oslo, Norway) to study the flow of water and transport and degradation of aromatic jet fuel components (toluene and o-xylene) in the undisturbed unsaturated zone. Site investigations with ground-penetrating radar revealed the presence of dippin...

journal_title：Journal of environmental quality

authors： Søvik AK,Alfnes E,Breedveld GD,French HK,Pedersen TS,Aagaard P

更新日期：2002-11-01 00:00:00

abstract：:Control methods are needed to abate NH losses from swine anaerobic lagoons to reduce the contribution of confined swine operations to air pollution. In a 15-mo meso-scale column study, we evaluated the effect of manure pretreatment on water quality, reduction of N losses, and sludge accumulation in swine lagoons using...

journal_title：Journal of environmental quality

authors： Szogi AA,Vanotti MB

更新日期：2014-07-01 00:00:00

abstract：:Bedding materials may affect air quality in livestock facilities. Our objective in this study was to compare headspace concentrations of ammonia (NH), total reduced sulfides (TRS), carbon dioxide (CO), methane (CH), and nitrous oxide (NO) when pine wood chips ( spp.) and corn stover ( L.) were mixed in various ratios ...

journal_title：Journal of environmental quality

authors： Spiehs MJ,Brown-Brandl TM,Parker DB,Miller DN,Berry ED,Wells JE

更新日期：2016-03-01 00:00:00

abstract：:Land application of co-produced waters from coalbed natural gas (CBNG) wells is one management option used in the Powder River Basin (PRB) of Wyoming and Montana. Unfortunately, the co-produced CBNG waters may be saline and/or sodic. The objective of this study was to examine the effects of irrigation with CBNG waters...

journal_title：Journal of environmental quality

authors： Vance GF,King LA,Ganjegunte GK

更新日期：2008-09-01 00:00:00

abstract：:The effect of liquid hog manure (LHM) and commercial fertilizer on NO-N leaching was measured for 2 yr in a long-term manure experiment on a loamy sand soil at Carberry, MB. The field experiment, sown to barley ( L.) and wheat ( L.), comprised six treatments including two rates of LHM (28, 084 and 56,168 L ha [2500 an...

journal_title：Journal of environmental quality

authors： Karimi R,Akinremi W

更新日期：2018-05-01 00:00:00

abstract：:Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to investigate the relationship between ammonia volatilization and delta15N o...

journal_title：Journal of environmental quality

authors： Hristov AN,Zaman S,Vander Pol M,Ndegwa P,Campbell L,Silva S

更新日期：2009-10-29 00:00:00

abstract：:Since its discovery in 1669, phosphorus (P) in the form of fertilizer has become an essential input for many agroecosystems. By introducing a concentrated P source, fertilizers increase short-term P export potential soon after their application and longer-term export potential by increasing soil fertility (legacy P). ...

journal_title：Journal of environmental quality

authors： Nash DM,McDowell RW,Condron LM,McLaughlin MJ

更新日期：2019-09-01 00:00:00

abstract：:Phosphorus (P) losses from nonpoint sources into surface water resources through surface runoff and tile drainage play a significant role in eutrophication. Accordingly, the number of studies involving the modeling of agricultural P losses, the uncertainties of such models, and the best management practices (BMPs) sup...

journal_title：Journal of environmental quality

authors： Wang Z,Zhang T,Tan CS,Qi Z

更新日期：2020-09-01 00:00:00

abstract：:Very little has been reported on the effects of pH, Zn, and Mn on Cd uptake in rice ( L.) and their levels under field conditions. Rice accumulates a high concentration of Cd in acid soils, even at low soil Cd levels. Lime (CaO) was spread at 1200 kg ha on the topsoil of a rice field during the tillering stage. Effect...

journal_title：Journal of environmental quality

authors： Wang M,Yang Y,Chen W

更新日期：2018-03-01 00:00:00

abstract：:The frequency and intensities of dust exposures in and near farm fields, which potentially contribute to high intensity human exposure events, are undocumented due to the transient nature of local dust plumes and the difficulties of making accurate concentration measurements. The objective of this study is to measure ...

journal_title：Journal of environmental quality

authors： Hiscox AL,Miller DR,Holmén BA,Yang W,Wang J

更新日期：2008-03-01 00:00:00

abstract：:Sulfonylurea herbicides are applied at relatively low rates (3 to 40 g ha(-1)) to control weeds in a variety of crops across the Canadian prairies. Because of their high phytotoxicity and the likelihood of their transport in surface runoff, there is concern about their possible impact to aquatic ecosystems. Little is ...

journal_title：Journal of environmental quality

authors： Cessna AJ,Donald DB,Bailey J,Waiser M,Headley JV

更新日期：2006-10-27 00:00:00

abstract：:Polyacrylamide (PAM) treatment of irrigation water is a growing conservation technology in irrigated agriculture in recent years. There is a concern regarding the environmental impact of PAM after its application. The effects of anionic PAM on the sorption characteristics of four widely used herbicides (metolachlor, a...

journal_title：Journal of environmental quality

authors： Lu J,Wu L,Letey J,Farmer WJ

更新日期：2002-07-01 00:00:00

abstract：:Current vegetable production systems use polyethylene (plastic) mulch and require multiple applications of agrochemicals. During rain events, runoff from vegetable production is enhanced because 50 to 75% of the field is covered with an impervious surface. This study was conducted to quantify off-site movement of soil...

journal_title：Journal of environmental quality

authors： Rice PJ,McConnell LL,Heighton LP,Sadeghi AM,Isensee AR,Teasdale JR,Abdul-Baki AA,Harman-Fetcho JA,Hapeman CJ

更新日期：2001-09-01 00:00:00

abstract：:The introduction of portable in situ ultraviolet-visual spectrometers has made possible the collection of water quality parameters at a high frequency in dynamic systems such as tidal marshes. The usefulness of this technology is inhibited by fouling of the instrument's optics. In this study, a spectrometer fitted wit...

journal_title：Journal of environmental quality

authors： Etheridge JR,Birgand F,Burchell MR,Smith BT

更新日期：2013-11-01 00:00:00

abstract：:Annual and multiyear records of trace element deposition are difficult to develop using monitoring systems but have proven feasible using plant material in several settings. Here, we used material from several tree species (Populus deltoides W. Bartram ex Marshall, Platanus occidentalis L., and Ginkgo biloba L.) to de...

journal_title：Journal of environmental quality

authors： Mazari K,Filippelli GM

更新日期：2020-01-01 00:00:00

abstract：:The Abbotsford-Sumas Aquifer is a shallow, predominantly unconfined aquifer that spans regions in southwestern British Columbia, Canada and northwestern Washington, USA. The aquifer is prone to nitrate contamination because of extensive regional agricultural practices. A 22-month ground water nitrate assessment was pe...

journal_title：Journal of environmental quality

authors： Mitchell RJ,Babcock RS,Gelinas S,Nanus L,Stasney DE

更新日期：2003-05-01 00:00:00

abstract：:Placement strategies for P fertilizer can affect P availability to crops and influence the amounts and forms of P removed from soil in runoff, contributing to eutrophication. On the Canadian prairies, most runoff occurs during snowmelt. Two adjacent farm fields in Saskatchewan, Canada, were used to assess the effects ...

journal_title：Journal of environmental quality

authors： Wiens JT,Cade-Menun BJ,Weiseth B,Schoenau JJ

更新日期：2019-05-01 00:00:00